La Salle Extension University. (1909). Business administration text: Prepared by 400 of the foremost educators, business and professional men in America. La Salle extension University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)La Salle Extension University. Business Administration Text: Prepared by 400 of the Foremost Educators, Business and Professional Men in America. Chicago: La Salle extension University, 1909.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)La Salle Extension University. Business Administration Text: Prepared by 400 of the Foremost Educators, Business and Professional Men in America. La Salle extension University, 1909.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.